Wynncraft Texture Pack Crashes My Minecraft

So, um... yeah, anytime I try to download the server pack, my minecraft instantaneously just crashes itself, and i have no idea why. My only guess is when I boot it up the loading of the textures just make it crash, you guys know how to fix this problem. Any help would be appreciated, thanks!

 

Try to allocate more RAM?

 

How much should I allocate?

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Allowed up to 1024 MB of memory allocation, but the texture pack still crashed me, what should I do now?

 

I recommend half of what your system has. For example, if you have 8 GB in your computer, you allocate 4 GB into Minecraft.

 

Allowed up to 4000 MB (4 GB) of memory, texture pack still is crashing me, it seems that memory allocation isn't helping, what should I do now?

 

Try installing Optifine if you haven't already?

 

I've installed optifine

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Had it from the start of entering the server, but pack still crashes me